Untapped potential for sealants, glues, hemostats in wound caseloads and procedures

Today’s surgeon has a broad range of products from which to choose for closing and sealing wounds. These include sutures, stapling devices, vascular clips, ligatures, and thermal devices, as well as a wide range of topical hemostats, surgical sealants and glues.

However, surgeons still primarily use sutures for wound closure and securement—sutures are cheap, familiar and work most of the time. Now, in addition to reaching for a stapling device, the surgeon must frequently decide at what point to augment or replace the commonly used items in favor of other products, which product is best for what procedure or condition, how much to use, and ease of use in order to achieve optimal patient outcomes. Because of budget pressures, the surgeon must also consider price when selecting a product. Of course in the USA, the product must also be FDA-approved, although the surgeon still has the choice of using a product off-label.

In the areas of sealants, hemostats and glues, there is room for both improvement and additional products.  There are a number of products already on the market, but the fact is that there is no one product that meets all needs in all situations and procedures. There are few products that stand out from the rest, apart, perhaps, from DermaBond® and BioGlue®. There are unmet needs, and companies having the necessary technology, or which may acquire and further develop the technology, can enter this market and launch novel items. These products have yet to significantly tap the potential for wound management and medical/surgical procedures.

Note: Log10 scale; Chronic wounds includes pressure, venous/arterial and diabetic ulcers.

Source: MedMarket Diligence, LLC; Report #S290.

Sealants, Fibrin and Others

Numerous variants of fibrin sealant exist, including autologous products. “Other” sealants refers to thrombin, collagen & gelatin-based sealants.

Fibrin sealants are used in the US in a wide array of applications; they are used the most in orthopedic surgeries, where the penetration rate is thought to be 25-30%. Fibrin sealants can, however, be ineffective under wet surgical conditions. The penetration rate in other surgeries is estimated to be about 10-15%.

Fibrin-based sealants were originally made with bovine components. These components were judged to increase the risk of developing bovine spongiform encephalopathy (BSE), so second-generation commercial fibrin sealants (CSF) avoided bovine-derived materials. The antifibrinolytic tranexamic acid (TXA) was used instead of bovine aprotinin. Later, the TXA was removed, again due to safety issues. Today, Ethicon’s (JNJ) Evicel is an example of this product, which Ethicon says is the only all human, aprotinin free, fibrin sealant indicated for general hemostasis. Market growth in the Sealants sector is driven by the need for improved biocompatibility and stronger sealing ability—in other words, meeting the still-unsatisfied needs of physician end-users.

High Strength Medical Glues

Similar to that of sealants, the current market penetration of glues in the US is thought to be about 25% of eligible surgeries. There are several strong points in favor of the use of medical glues: their use can significantly reduce healthcare costs, for example by reducing time in the surgical suite, reducing the risk of a bleed, which may mean a return trip to the OR, and general ease of use. Patients seem to prefer the glues over receiving sutures for an external wound, as glues can provide a suture-free method of closing wounds. In addition, if glues are selected over sutures, the physician can avoid the need (and cost) of administering local anesthesia to the wound site.

Hemostats

Hemostats are normally used in surgical procedures only when conventional bleeding control methods are ineffective or impractical. The hemostat market offers opportunities as customers seek products that better meet their needs. Above and beyond having hemostats that are effective and reliable, additional improvements that they wish to see in hemostat products include: laparoscopy-friendly; work regardless of whether the patient is on anticoagulants or not; easy to prepare and store, with a long shelf life; antimicrobial; transparent so that the surgeon continues to have a clear field of view; and non-toxic; i.e. preferably not made from human or animal materials.


Drawn from, “Worldwide Markets for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022:  Established and Emerging Products, Technologies and Markets in the Americas, Europe, Asia/Pacific and Rest of World.” Report #S290.

Add tick cement to the list of natural adhesives pursued for medical applications

In past posts, we have reported on multiple naturally-occurring substances or methods for strong adhesion that are being investigated for their potential to be exploited for medical or surgical adhesion. These include adhesives from remora, mussels, geckos, crab shells, barnacles, Australian burrowing frogs, spider webs, porcupine quills, sandcastle worms, etc.

Researchers from MedUni Vienna and Vienna University of Technology are now investigating 300 different ticks for the “cement” used by the parasites to attach to hosts. The goal is to study the composition of the natural tick “dowel” used by the mouthparts of ticks and determine how it might serve as a template for new tissue adhesives.

The Vienna research also notes other natural adhesives are similarly being investigated for medical and surgical use:

Other potential “adhesive donors” are sea cucumbers, which shoot sticky threads out of their sac; species of salamander, which secrete extremely fast-drying adhesive out of skin glands, if attacked; or insect larvae, which produce tentacles or crabs, which can remain firmly “stuck,” even under water.

The incentive for studying natural adhesives is that they have been driven by evolution to provide strong adhesion without toxicity in various wet or dry conditions that are challenging for existing synthetic or existing natural glues (e.g., fibrin glues, cyanoacrylates, etc.). Surgical glues currently in use have some limitation arising from lesser strength, ease of use, toxicity, and other shortcomings. New glues will gain wider adoption, capturing procedure volume used with sutures, clips and other closure methods, particularly in internal use, if they are stronger and/or provide tighter seals (without needing to be combined with sutures on the same incision/wound) and do not cause the toxicity that some high strength medical glues do (e.g., synthetics like cyanoacrylates; “super glues”). The biologically-derived glues (or the surfaces structures of gecko feet) avoid the toxicities of synthetics and have often proven to have very high tensile strength. (The fast-curing cement used by barnacles has been shown to have a remarkable tensile strength of 5,000 pounds per square inch.)


MedMarket Diligence tracks the technologies, clinical practices, companies, and markets associated with medical and surgical sealants and glues, with the most recent coverage in, “Worldwide Markets for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022,” (report #S290).

Biologically-based medical glues to start sticking in A/P

The bulk of medical/surgical glues are biologically-based, and soon the bulk of medical glue sales will come from Asia/Pacific.

The two graphs below show the changes in regional shares in biologically-based glues. It can be seen that from 2015 to 2022, the US and Asia-Pacific will practically switch places in terms of revenue share per region. This significant change will come about because of the intensive and enormous healthcare modernization taking place in the PRC. In 2012, the Chinese government announced its 12th five-year plan which includes the construction of 20,000 new hospital and healthcare facilities.

Source: Worldwide Markets for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022:  Established and Emerging Products, Technologies and Markets in the Americas, Europe, Asia/Pacific and Rest of World (Report #S290).

High strength medical and surgical glues, growth to 2022

High strength medical and surgical glues currently command a $1.2 billion market that will grow to $1.7 billion by 2022, representing a 6.4% compound annual growth rate. More importantly, however, is that during this time frame the market will undergo steady shifts, including the regional representation, with growth slowing in western markets relative to Asia-Pacific and the rest of the world.

Below is illustrated the size versus growth of high strength glues in the U.S., Western Europe, Asia-Pacific and Rest of World.

Source: MedMarket Diligence, LLC; Report #S290. Order online.

The resulting differential growth over this period will result in a shift in the regional market balance, as shown below.

Source: MedMarket Diligence, LLC; Report #S290. Order online.

Source: MedMarket Diligence, LLC; Report #S290. Order online.

Wound Hemostasis, Closure, and Sealing in the U.S. versus Asia/Pacific, 2015-2022

Sales of sealants, glues, and hemostats projected to 2022 for the U.S. and Asia/Pacific. While these products have had tremendous success in Japan, their sales in the rest of Asia/Pacific have not yet caught up to Japan, let alone to the U.S.

But that is expected to change as the most significant growth in these markets will indeed be coming from China, Korea, Australia, India, and elsewhere in these emerging markets.

Sales of Sealants, Glues, and Hemostats in the
U.S. and Asia/Pacific Markets, 2015-2022

Note: For direct comparative purposes, sales in these markets are shown on the same vertical scale.

Source: MedMarket Diligence, LLC; Report #S290. Available for purchase/download online.

Medical and Surgical Sealants, Glues, and Hemostats, to 2022

There are several different classes of surgical sealants, glues and hemostatic products used to prevent or stop bleeding, or to close a wound or reinforce a suture line. These include fibrin sealants, surgical sealants, mechanical hemostats, active hemostats, flowable hemostats, and glues. Both sealants and medical glues are increasingly used either as an adjunct to sutures or to replace sutures.

Medical Sealants

Fibrin sealants are made of a combination of thrombin and fibrinogen. These sealants may be sprayed on the bleeding surface, or applied using a patch. Surgical sealants might be made of glutaraldehyde and bovine serum albumin, polyethylene glycol polymers, and cyanoacrylates.

Sealants are most often used to stop bleeding over a large area. If the surgeon wishes to fasten down a flap without using sutures, or in addition to using sutures, then the product used is usually a medical glue.

Source: MedMarket Diligence, LLC; Report #S290.

Hemostatic Products

The surgeon and the perioperative nurse have a variety of hemostats from which to choose, as they are not all alike in their applications and efficacy. Selection of the most appropriate hemostat requires training and experience, and can affect the clinical outcome, as well as decrease treatment costs. Some of the factors that enter into the decision-making process include the size of the wound, the amount of hemorrhaging, potential adverse effects, whether the procedure is MIS or open surgery, and others.

Active hemostats contain thrombin products which may be derived from several sources, such as bovine pooled plasma purification, human pooled plasma purification, or through human recombinant manufacturing processes. Flowable-type hemostats are made of a granular bovine or porcine gelatin that is combined with saline or reconstituted thrombin, forming a flowable putty that may be applied to the bleeding area.
Mechanical hemostats, such as absorbable gelatin sponge, collagen, cellulose, or polysaccharide-based hemostats applied as sponges, fleeces, bandages, or microspheres, are not included in this analysis.

Source: MedMarket Diligence, LLC; Report #S290.

Medical Glues

Sealants and glues are terms which are often used interchangeably, which can be confusing. In this report, a medical glue is defined as a product used to bond two surfaces together securely. Surgeons are increasingly reaching for medical glues to either help secure a suture line, or to replace sutures entirely in the repair of soft tissues. Medical glues are also utilized in repairing bone fractures, especially for highly comminuted fractures that often involve many small fragments. This helps to spread out the force-bearing surface, rather than focusing weight-bearing on spots where a pin has been inserted.

Thus, the surgeon has a fairly wide array of products from which to choose. The choice of which surgical hemostat or sealant to use depends on several factors, including the procedure being conducted, the type of bleeding, severity of the hemorrhage, the surgeon’s experience with the products, the surgeon’s preference, the price of the product and availability at the time of surgery. For example, a product which has a long shelf life and does not require refrigeration or other special storage, and which requires no special preparation, usually holds advantages over a product which must be mixed before use, or held in a refrigerator during storage, then allowed to warm up to room temperature before use.

Source: MedMarket Diligence, LLC; Report #S290.


From “Worldwide Market for Medical and Surgical Sealants, Glues, and Hemostats, 2015-2022.” See details at link. Order online.

Hemostat Sales to 2022

Owing to their ease of use, ease of handling, and general clinical utility, hemostat sales will almost double worldwide between 2016 and 2022:

Source: MedMarket Diligence, LLC; Report #S290. Order online.

Hemostat sales are exceptionally strong in the well developed economies (Japan, Australia, Korea) of Asia, and will continue to expand there with the rapidly growing contribution of China’s hemostat sales.

Source: MedMarket Diligence, LLC; Report #S290. Order online.

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Regional Markets for Surgical Sealants, 2015 and 2022

The fastest growth in the sales of surgical sealants over the next decade will be in the Asia-Pacific region, driven primarily by very strong healthcare market growth in China, and reaching a CAGR (2016-2022) of at least 13.97%. The growth rate in China would be even higher, but will be dampened for the time being by the lack of surgeons trained in the proper use of these products, as well as the limitations of reaching a dispersed patient population. Nonetheless, the A/P share of the global sealants market will double in the next seven years!

Below illustrates the geographic distribution of surgical sealants (fibrin and others) in 2015.

Regional Markets for Sealants, Fibrin and Other Sealant Products,
2015 & 2022, USD Millions

2015screen-shot-2016-11-11-at-8-52-44-am

2022

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Source: MedMarket Diligence, LLC; Report #S290.


Report #S290 may be purchased online for PDF download or print delivery; in single, site, or global licenses.

Wound closure and healing via sealants, glues, hemostats in development

Natural tissue healing is a highly complex dance of processes that need to be working properly in order for the body to heal. Mammals have developed the ability to heal wounds rapidly through a cascade of processes that starts with hemostasis (blood clotting) to slow or stop the loss of blood. From the moment of injury, platelets start to aggregate, as well as starting to release cytokines, chemokines and hormones. Vasoconstriction takes place as the body tries to limit the loss of blood, and several vasoactive mediators come into play, including, norepinephrine, epinephrine, prostaglandins, serotonin, and thromboxane. Activated platelets lead to formation of a clot. Next, the inflammatory steps kick in, targeting and killing microbes and launching a natural internal debridement process, which serves to clean up any damaged tissue so that reconstruction may occur. Last in the cascade are the proliferative and maturation phases. These involve the deposition of new tissue matrix materials, and are intended to lead to reconstruction of tissue organelles and cellular structure. These healing steps actually overlap one another, and do not have strict times when each process begins or ends.

A delicate physiological balance must be maintained during the healing process to ensure timely repair or regeneration of damaged tissue. Wounds may fail to heal or have a greatly increased healing time when unfavorable conditions are allowed to persist. An optimal environment must be provided to support the essential biochemical and cellular activities required for efficient wound healing and to remove or protect the wound from factors that impede the healing process.

Factors affecting wound healing may be considered in one of two categories depending on their source. Extrinsic factors impinge on the patient from the external environment, whereas intrinsic factors directly affect the performance of bodily functions through the patient’s own physiology or condition. Factors which strongly affect wound healing include smoking, diabetes, age, oxygenation, stress, obesity, certain medications, alcoholism and nutrition.

Timescales for Development of
Sealants, Glues and Hemostat Products

screen-shot-2016-10-31-at-2-55-14-pm

Source: MedMarket Diligence, LLC; Report #S290.

While product development continues apace, and companies are launching their products in new countries, launches of actual new products has been relatively slow. This is due most likely to the highly technical (read: expensive) nature of the product development, as well as the cost and time involved in running clinical trials, and the strong patent protection which has been erected, especially by the leading companies. The need for the products is there, but the required clinical testing is putting a brake on the markets.

In July 2015, HyperBranch announced the product launch of Adherus® AutoSpray Dural Sealant in the US. FDA clearance to market the product was obtained in March 2015. The absorbable sealant is intended for use in brain surgery and is applied over the sutures for dura repair to prevent cerebrospinal fluid from leaking out of the incision site. The Adherus® AutoSpray Dural Sealant is made of two solutions: a PEG ester solution and a polyethylenimine (PEI) solution. When mixed together, the solutions combine to form a sealant gel that is applied to the incision site. According to the company, the sealant is fully absorbed in about 90 days.

Cohera Medical launched its TissuGlu® in select US cities in November 2015. At this point, TissuGlu® is available in ten cities in the USA, while B. Braun is the distributor for the product in Germany, Spain and Portugal.

Sanyo Chemical launched its first medical device, Hydrofit, in February 2014. The company obtained the approval of the medical device under the Pharmaceutical Affairs Law in December 2011, filing it as a novel surgical hemostatic agent intended for anastomosing the arterial blood and artificial blood vessel in surgical procedures. According to the company, the product will be produced by Sanyo and marketed by Terumo.

In 2014, Cohera Medical, Inc. launched Sylys Surgical Sealant, which can be used in gastrointestinal surgery to decrease anastomotic leak. In the same year, Baxter also gained the FDA permission for Tisseel® fibrin sealant, which, according to the company, is used in almost all types of surgical procedures.

Mallinckrodt will invest in the commercial launch and ongoing market development of both PreveLeak and Raplixa in FY 2016. According to the company, both products are faster to prepare and easier to use and store than competing products. PreveLeak, a surgical sealant, is allegedly more flexible than hemostasis glue products. It is indicated for use in vascular reconstructions to achieve adjunctive hemostasis by sealing areas of leakage. PreveLeak is currently marketed in Europe through distributors.

In an example of a delayed launch, CryoLife has been working towards launch of PerClot in the US, but ran into litigation trouble with Medafor, a wholly-owned subsidiary of CR Bard. In November 2015, CryoLife announced that it had entered into a resolution with Medafor to end the patent dispute in the US District Court for the District of Delaware between the companies regarding PerClot. Under terms of the resolution, all parties agreed to end the litigation, jointly dismissing all claims and counterclaims with prejudice and waiving all appeal rights in this case.  Each party is to pay its own attorneys’ fees and costs associated with the litigation.  However, the court’s preliminary injunction entered March 31, 2015 with respect to CryoLife’s marketing and sale of PerClot in the US will remain in effect until the expiration of Medafor’s US Patent No. 6,060,461 (the “‘461 Patent”) on February 8, 2019. CryoLife management says that this will not upset their plans, as CryoLife does not expect to receive FDA market approval for PerClot before 2018, if then.


From “Sealants, Glues, Hemostats to 2022” (#S290).

Medical, Surgical Sealants — Fibrin and Others

screen-shot-2016-10-26-at-2-23-29-pmFibrin is the result of the combination of solutions of thrombin and fibrinogen. This forms a clot just as in the body during the coagulation cascade. The thrombin then breaks the fibrinogen molecules into smaller bits of another blood protein, called fibrin. Fibrin molecules arrange themselves into a lattice with strands cross-linked by the blood component, Factor XIII. This resulting cross-linked net helps to stabilize the clot.

Numerous variants of fibrin sealant exist, including autologous products. Other, non-fibrin sealant types are thrombin, collagen & gelatin-based sealants.

Fibrin sealants are used in the US in a wide array of applications; they are used the most in orthopedic surgeries, where the penetration rate is thought to be 25-30%. Fibrin sealants can, however, be ineffective under wet surgical conditions. The penetration rate in other surgeries is estimated to be about 10-15%.

Fibrin-based sealants were originally made with bovine components. These components were judged to increase the risk of developing bovine spongiform encephalopathy (BSE), so second-generation commercial fibrin sealants (CSF) avoided bovine-derived materials. The antifibrinolytic tranexamic acid (TXA) was used instead of bovine aprotinin. Later, the TXA was removed, again due to safety issues. Today, Ethicon’s (JNJ) Evicel is an example of this product, which Ethicon says is the only all human, aprotinin free, fibrin sealant indicated for general hemostasis. Market growth in the sealants sector is driven by the need for improved biocompatibility and stronger sealing ability—in other words, meeting the still-unsatisfied needs of physician end-users.

The current market penetration of sealant products in the US stands at about 25% of eligible surgeries, with their largest volume of use in orthopedics.

Selected Fibrin and Other Sealant Types*

screen-shot-2016-10-26-at-2-10-21-pm

*Market status on each detailed in report S290.

Source: MedMarket Diligence, LLC; Sealants, Glues, Hemostats to 2022.